Working barrel for deep well pumps



April 1934- o. E. GRIFFITHS 1,953,172

WORKING BARREL FOR DEEP WELL PUMPS Original Filed March 1, 1932 INVENTORPatented Apr. 3, 1934 WORKING BARREL FOR DEEP WELL PUMPS Orah E.Grilfiths, Beaver Falls, Pa., assignor to The Correct Measure Company,Rochester, Pa., a corporation of Pennsylvania nplication March 1, 1932,Serial No. 595,987 Renewed December 22, 1933 3 Claims. (Cl. 103-216)This invention relates to improvements in deep well pumps moreparticularly to improvements in the working barrel and lining of deepwell pumps for intimately locking the lining with the barrel proper.

In my copending application Serial No. 516,661 filed February 18, 1931,I have disclosed a deep well pump, the features of which are thegrooving of the inner wall with the working barrel and the grooving ofthe outer surface of the plunger to form a liquid seal whereby thepacking cups of the conventional form of pumps are eliminated, andwherein the grooves function to displace sand which may be present inthe liquid thereby preventing scoring or marring of the cylinder andplunger.

This type of pump is particularly adapted for deep well operation, andthe working cylinder is seven feet in length, and on account of thegreat to bore the barrel and line the interior wall thereof with a brassor bronze liner and the present invention is particularly designed toprovide for the fastening of such liner in the working barrel, and alsofor producing strong and safe joints of the barrel with the casing ofthe pump. 'Accordingly, it is a primary object of the present inventionto provide means for securely fastening and interlocking a brass linerin a working barrel for deep well pumps.

The invention will be more clearly understood in connection with theaccompanying drawing constituting a part hereof in which like referencecharacters designate like parts. and in which:

Figure 1 is a longitudinal cross sectional view of a working barrel, abrass liner, and connecting couplings, embodying the principles of thisinvention; and,

Fig. 2 is a longitudinal sectional view of the coupling member forinterlocking the brass liner with the working barrel and for connectingthe working barrel to the pump casing.

With reference to the drawing, 1 constitutes a working barrel made ofmild carbon steel or the like which is bored out in the conventionalmanner by mounting it in a lathe and removing the metal from solid barto constitute a hollow tube of straight concentric form.

The working barrel is provided with threads 2 on its respective ends anda brass liner 3 in the form of a tube is intimately engaged with the ofrelatively great length varying from three to,

' grooves 4 in axially spaced relation which cooperate with groovesformed in the plunger (not herein shown) to form liquid seals and. toallow for the displacement of sand to prevent scoring of the barrel andplunger.

The liner 3 is provided with a screw thread 5 at its respective end andis of greater length than the working barrel so much so that thethreaded portion of the liner extends beyond the thread 2 of the barrel.

To provide for the interlocking of the barrel and liner, a nipple orcoupling 6 is employed having threaded portions at the mid-sectionthereof corresponding tothe threads 5 of the liner for engaging thethreads of the liner, and a threaded portion 7 which interacts with thethreads 2 of the working barrel.

A feature of this invention is the employment of threads of differentpitch for the ends of the barrel and liner, an example of which is shownin Figure l of the drawing in which the threaded portion 2 has elevenand one-half threads to the inch, and the threaded portion 5 twelvethreads per inch so that when the nipple 6 is turned on the threads 2and 5, the nipple will tend to move faster in an axial direction alongthe thread 2 than on the thread 5 to cause the nipple to interlockbetween the two sets of strands of different pitch to securely hold theworking barrel and liner together The nipple or coupling 6 is alsoprovided with a threaded portion 8 for screwing it onto the pump casingat the top end and for fastening it to a sump or screen 9 at its lowerend which is the end that is lowered into the pool such as an oil poolin which the pump is operated.

By constructing the barrel in the manner specified, namely, by boring itfrom a solid steel bar and providing it with a liner secured by thethreaded coupling with differentiation of the thread to form theinterlock, a strong durable structure is produced, which is in truealinement with the working plunger.

By employing the novel means of interlocking the liner and workingbarrel, the parts are securely held thereby eliminating the hazard ofthe liner becoming loose in the barrel during operation and caus ngdamage by the reciprocatory movement of the plunger.

By utilizing the means of interlocking the barrel and liner as hereinemployed, the parts may be 110 readily assembled and dismembered as thecase may be which is of importance in oil field operations where theparts must be handled with the employment of a minimum number of specialtools.

Although one embodiment of the invention has been herein illustrated anddescribed, it will be obvious to those skilled in the art that variousmodifications may be made in the details of construction withoutdeparting from the principles herein Set forth.

I claim as my invention: a

1. A working barrel for pumps comprising an outer casing having threadedends and an interior lining having threaded ends which extend beyond theends of the work ng barrel or casing, and threaded couplings havingthreaded portions for engagement with the threads of the barrel and thelining which threads are of different pitch whereby upon rotativemovement of the couplings the barrel and liner are interlocked.

2. A working barrel for pumps comprising a cylindrical casing and abrass liner, the casing and liner having their respective ends providedwith screw threads of different pitch, coupling members for connectingsaid barrel and liner having threaded portions for interacting with thethreads of said casing and liner so that when the couplings are screwedon the threads the working barrel and liner will be securelyinterlocked.

3. A working barrel for deep well pumps comprising a relatively longcylindrical casing or tubing, a liner therefor having annular grooves onthe interior surface thereof and adapted for intimate engagement withthe inner wall of said tubing, said liner having its ends projectingbeyond the ends of the working barrel, and said working barrel and linerhaving threads of difierent pitch formed exteriorly of their respectiveends, and coupling members having threaded portions adapted to interactwith the threads of the working barrel and liner whereby the said barreland liner are interlocked, said couplings having threaded portions forconnection with the pump casing whereby the working barrel is fastenedin the pump line.

' ORAH E. GRIFFITHS.

